Quick answers
- Which hospitals does John S. Sierocki work at?
- Medicare's official clinician data lists John S. Sierocki at 1 hospital: University Medical Center of Princeton at Plainsboro. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John S. Sierocki see patients?
- Medicare's clinician data lists 3 practice locations, including Cranberry Twp, PA, Plainsboro, NJ and Princeton, NJ. Call before your visit to confirm the address.
- What is John S. Sierocki's specialty?
- Medicare lists Medical Oncology as the primary specialty.
- Does John S. Sierocki accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Sierocki accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does John S. Sierocki offer telehealth?
- Medicare's clinician data says John S. Sierocki offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John S. Sierocki?
- (609) 924-9300, as listed in official Medicare / NPI Registry data.
- What is John S. Sierocki's NPI number?
- 1487792354. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John S. Sierocki works
Medicare's Facility Affiliation Data lists John S. Sierocki at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University Medical Center of Princeton at PlainsboroPlainsboro, NJ · Acute Care Hospital · CCN 310010
Practice locations
Addresses where John S. Sierocki is enrolled with Medicare (CMS data updated 2026-10-02).
- 2000 Westinghouse Dr, Suite 200Cranberry Twp, PA 16066
- 3 Liberty StPlainsboro, NJ 08536 (609) 924‑9300
- 419 N Harrison StPrinceton, NJ 08540 (609) 924‑9300
Group practices
Medicare enrollment lists John S. Sierocki as a member of these groups (CMS data updated 2026-10-02).
- Phoenix Rehabilitation and Health Services Inc2,800 clinicians in the group
- Princeton Medical Group, P.A.35 clinicians in the group
Specialties
- Medical Oncologyprimary
Other oncologists in Pennsylvania
Clinicians with the same Medicare primary specialty in Pennsylvania — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Hahnemann University College Of Medicine |
| Graduation year | 1973 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1487792354 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians